/*
**    Copyright (C) 2003-2011 Institute for Systems Biology
**                            Seattle, Washington, USA.
**
**    This library is free software; you can redistribute it and/or
**    modify it under the terms of the GNU Lesser General Public
**    License as published by the Free Software Foundation; either
**    version 3 of the License, or (at your option) any later version.
**
**    This library is distributed in the hope that it will be useful,
**    but WITHOUT ANY WARRANTY; without even the implied warranty of
**    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
**    Lesser General Public License for more details.
**
**    You should have received a copy of the GNU Lesser General Public
**    License along with this library; if not, write to the Free Software
**    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
*/

package org.systemsbiology.iteration;

import java.util.Iterator;
/**
 * An abstract Iterable that "contains" no elements. Implementation of the Null Object
 * Pattern for Iterable. Always returns an EmptyIterator<T>, which proceeds to yield nothing.
 * @author anorberg
 *
 * @param <T> The theoretical yield type of the iterator (which will always return false on hasNext()
 * and null for next(), so this is only to make interface requirements happy).
 */
public class EmptyIterable<T> implements Iterable<T> {

	// implicit default constructor
	
	@Override
	public Iterator<T> iterator() {
		return new EmptyIterator<T>();
	}

}
